Homeowner who has been reading a ton on this board and learning a lot.
I have a 3rd floor walk up attic that I am considering finishing off part of it. The finished part would be about 20x20. The roof pitch is 9/12.
Here is a pic of the space:
Here is the current insulation (house is 1993):
My HVAC is in the attic and the duct work is outside the knee wall. (hence I can finish the 20x20 space). From what I have been reading, having my HVAC in conditioned space would be better. So I am thinking of insulation the rafters, with baffles from soffit to ridge. Granted I am looking at 27 “rafter bays” front and rear (54) and each is 24 feet in length. That is 1300 feet of batts not including the side walls!
Anyway my main question is where the knee wall intersects with the rafters (2x8s). There is only 5" from the top of the knee wall to the roof decking at the intersection. Even if I put furring strips on the rafters for more depth for insulation, what do I do there???
Here is a pic:
Any thoughts? Am I crazy to insulate the whole attic space? Should I just focus on the “room”?